I just compiled Open MPI 1.6.1 and before digging any deeper: does anyone else notice, that the command:

$ mpiexec -n 4 -machinefile mymachines ./mpihello

will ignore the argument "-machinefile mymachines" and use the file "openmpi-default-hostfile" instead all the time?

==

SGE issue

I usually don't install new versions instantly, so I only noticed right now, that in 1.4.5 I get a wrong allocation inside SGE (always one process less than requested with `qsub -pe orted N ...`. This I tried only, as with 1.6.1 I get:

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There are no nodes allocated to this job.
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